Ji, Li
McDaniel, Martin D.
Wang, Shijun
Posadas, Agham B.
Li, Xiaohan
Huang, Haiyu
Lee, Jack C.
Demkov, Alexander A.
Bard, Allen J.
Ekerdt, John G.
Yu, Edward T.
Article History
Received: 5 May 2014
Accepted: 22 October 2014
First Online: 1 December 2014
Competing interests
: The authors declare no competing financial interests.